Mixer



' Aug. 25, 1931.

K. ADAMS MIXER Filed Jan.

' INVENTOR flew own Adams Patented Aug. 25, 1931 PATENT OFFICE KEMPTON ADAMS, BEDDING RIDGE, CONNECTICUT MIXER Application filed January 21, 1930. Serial No. 422,281.

This invention relates to mixing apparatus and particularly to a machine or apparatus for mixing materials, such as the ingredients of concrete.

V 5 The modern tendency in concrete practice is to use a stiff mix and mechanical devices or mixers now on the market are not adapted for or suited to the present requirements. Furthermore, difliculty has been experienced in effecting the complete discharge of the material from mixers of the type specified.

This invention has for its salient object to provide a mixer adapted for tho-roughly and efiiciently'stirring and working the ingredi ents of a stiff or relatively dry mix.

Another object of the invention "is to provide a mixer so constructed and arranged that the mixed materials can be quickly, positively and completely discharged from the apparatus.

Further objectsof the invention will appear from the following specification taken in connection with the drawings, which form a part of this application, and in which Fig. 1 is a vertical, sectional elevation of a mixer constructed in accordance with the invention;

Fig. 2 is a top plan view, partly in section, of the structure shown in Fig. 1, the section 3. being taken substantially on line 22 of Fig. 1;

Fig. 3 is a sectional elevation of the driving connections;

' Fig. 4 is a transverse sectional elevation I 3.5 of one of the stirring or mixing bars; and

Fig. 5 is a bottom plan view illustrating the closure for the bottom of the receptacle and the operating means therefor.

The invention briefly described consists of a mixer comprising a receptacle, a centrally disposed member in the receptacle having deflecting means adapted to lift and turn over the material, and a frame within the receptacle having means adapted to scrape the material from the wall of the receptacle and to feed the material downwardly and coact with the centrally disposed deflecting and stirring means to thoroughly mix thematerial. The receptacle within which the mixing devices 9 are enclosed, is preferably stationary, and

means is provided for rotating the outer frame in one direction and for rotating the member disposed centrally in the receptacle in the opposite direction. Furthermore, the driving means is so arranged that the directions of rotation of the parts can be reversed so as to feed the material downwardly during the emptying or dumping of the material from the receptacle.

Further details of the invention will appear from the following description.

In the particular form of the invention shownin the drawings, there is illustrated a receptacle 10 having mounted thereon at the upper end thereof a ring 12. Ase-00nd ring 13 is rigidly clamped to the ring 12 in spaced relation thereto.

A skeleton frame comprising an annular ring 20 and a plurality of bars 21 extending downwardly therefrom is mounted within the receptacle. -The bars are connected at their upper ends to a flange 22 formed on the ring 20. The ring 20 is mounted on rollers 25 positioned between the under surface of the ring 20 and a ball race 26 formed on the upper surface of ring 12.

The bars 21 are curved longitudinally away from the direction of movement of the ring and bars, as shown in Figs. 1 and 2. The longitudinal inclination or curvature of the bars 21 in the manner described causes the bars to feed the material downwardly during their rotation and the engagement of the bars with the material causes an inward movement of the material in the receptacle. Attention is also called to the factthat a slight clearance is provided between the bars and the inner surface of the receptacle 10.

A ball race 30 is formed on the upper sur face of the ring 20 and the ring has a vertically extending flange 31. formed thereon.

A ring 33 is mounted on balls 34 positioned between the under surface of the ring 33 and the ball race 30. The ring 33 has an annular recess or groove 33 extending upwardly therein which receives the flange 31 of'the ring 2( A ball race is provided on the upper surface of the ring 33 and an annular upwardly extending flange 35 is formed thereon. Balls 36 are positioned between the upper surface of the ring 33 and a ball race 37 formed in the ring 13.

From the foregoing description it will be seen that the rings 20 and 33 are mounted between the upper and lower rings 13 and 12 which are carried by the receptacle. Furthermore, the rings 20 and 33 are supported for free rotation on ball bearings.

The ring 33 has formed thereon or secured thereto, a plurality of inwardly extending arms 40, 41 and 42 which are connected at their inner ends tangentially to a central post 43. The post 43 has a peaked or pointed upper end 44 for deflecting the material dumped into the receptacle.

The post 43 has secured thereto and arranged in a spiral around the outer surface thereof, a plurality of deflecting vanes A, B, C and D. The vane A extends along the bottom of the receptacle at its lower edge and is curved upwardly, as shown in Fig. 1,.to defleet the material upwardly and turn it over. The vanes B, C and D also extend upwardly and are curved to raise and turn over the material.

Driving connections are provided for r0- tating the. central postand deflecting vanes or wings in one direction and for rotating the ring 20 and bars, 21 in the opposite direction. Each of the. rings 20: and 33 has gear teeth formed at the outer periphery thereof; Thering 20 is rotated by a gear 5.0 mounted on a shaft 51 which receives power from any suitable source. The ring 33; is driven by a gear 52 which is mounted on a. shaft 52. on which is alsomounted a gear 53' which meshes with a gearfit carried by the shaft 51. It will be obvious that the gears and 52 will rotate in opposite directionsand, therefore, that the rings 20 and 33 will be rotated in opposite directions. The driving gears are enclosed within a casing 55 which is. formed in extensions of the rings 12 and 13'. r

The bottom of the receptacle is: provided with a closure comprising a stationary member 30 and a rotatable'memberfil. The stationary member (SQ-has a pair of openings 62 and '63- and the rotatable member 61 has shutters or closures 65 adapted to register with the openings and to. close the openings in. one position of rotation oft-he member 61'. A handle 66' is secured to the member61 formoving-the member into closing or, openingposition, 1

The mixer above described operates in the following manner: hen a. charge of mate.- rial has. been dumped into the mixer, the shaft 52 will be rotated, thus causing the rings 20: and: 33 to rotate in opposite directions. As these rings are rotated,,,the central post 43 and vanes carried thereby will be rotated in. one direction to mix, stir, raise and turn. over thematerial in. the receptacle, and the bar-s21 will; rotate in the opposite direction coacting with the centrally disposed mixing means to thoroughly intermix the material. It has been found that the centrally disposed stirring and mixing means does not operate satisfactorily without the coaction of the bars 21 since the material disposed centrally in the receptacle is localized in a mass and rotates around with the central post and the blades carried thereby. Substantially no mixing is effected in this way. However, the rotation of the bars 21 in the opposite direction tends to resist and offers suflicient resistance to the localized action described to cause the mass of material in the receptacle to be thoroughly stirred and intermixed. The arms 21 furthermore, prevent the material from sticking or adhering to the inner surface of the receptacle. After the material in the receptacle has been thoroughly mixed, the direction of rotation of the rings 20 and 33 can be reversed and when the closure in the bottom of the receptacle has been opened, the material will be ejected through the bottom by the action of the vanes or wings A, B, C and D.

Although one specific embodiment of the invention has been particularly shown and described, it will be understood that the invention is capable of modification and that changes in the construction and in the arrangement 01' the various cooperating parts may be made without departing from the spirit or scope of the invention, as expressed in the following claims.

hat I claim is:

1. A mixer comprising a receptacle, 0.

frame mounted in and disposed adjacent the inner surface of the receptacle, means on said frame for moving material circumferentially and downwardly, means for rotating said frame, a member disposed centrally in said receptacle, deflecting means on said member,

inclined to feed the material upwardly and outwardly, and meansfor rotating said member relative to; the receptacle and in a direction opposite to the direction the. frame.

2. A mixer comprising a stationary receptacle, a frame mounted in and disposed adjacent the inner surface of the receptacle, means on said frame disposed adjacent the innerwaltl of the-receptacle for-feeding material circumferentially and 1 downwardly, meansfor rotating said frame, a member disof rotation of posed centrally in said receptacle, reflecting means on said member, inclined to feed the material upwardly and outwardly,y and means for rotating said member in a direction opposite tothe direction of rotation of the frame.

3. A .mixer' comprising a stationary receptacle, rotatable means within said receptacle for deflecting. material in the receptacle inwardly and downwardly, and means the receptacle, rotatable in the opposite direction, for deflecting the material upwardly and outwardly, said first means coacting with said second means to mix the material.

4. A mixer comprising a stationary receptacle, rotatable bars within said receptacle and adjacent the wall thereof for moving material in the receptacle circumferentially and downwardly, and centrally disposed means in the receptacle, rotatable in the opposite direction, for deflecting the material upwardly and outwardly.

5. A mixer comprising a stationary receptacle, a rotatable ring within said receptacle, bars carried by said ring and disposed adjacent the inner surface of the receptacle for moving material in the receptacle circumferentially and downwardly, and means in the receptacle, rotatable in the opposite direction, for deflecting the material upwardly and outwardly.

6. V A mixer comprising a stationary receptacle, downwardly extending members within said receptacle for moving material in the receptacle around the receptacle and downwardly therein, means in the receptacle, rotatable in the opposite direction, for deflecting the material upwardly and outwardly, a removable closure for the bottom of the receptacle, and rotatable means above and adjacent to the closure for deflecting the material upwardly away from the bottom.

7. A mixer comprising a stationary receptacle, means in the receptacle, for deflecting the material upwardly and outwardly, means adjacent the inner-wall of said receptacle for opposing the rotation of the mass of material .in said receptacle by said first named means, and mechanism for rotating said first means and said second means in opposite directions.

8. A mixer comprising a receptacle, a frame rotatable in said receptacle and having bars extending downwardly therein disposed adjacent the inner wall of the receptacle and inclined away from the direction of rotation thereof, means disposed centrally in the receptacle for lifting and turning over material therein, and means for rotating said frame and said means in opposite directions.

KEMPTON ADAMS. 

